Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

src/Kernel.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace App;
+
+use App\DependencyInjection\WallabagExtension;
+use App\Import\ImportCompilerPass;
+use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\Config\Loader\LoaderInterface;
+use Symfony\Component\Config\Resource\FileResource;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\HttpKernel\Kernel as BaseKernel;
+use Symfony\Component\Routing\RouteCollectionBuilder;
+
+class Kernel extends BaseKernel
+{
+    use MicroKernelTrait;
+
+    private const CONFIG_EXTS = '.{php,xml,yaml,yml}';
+
+    public function registerBundles(): iterable
+    {
+        $contents = require $this->getProjectDir() . '/config/bundles.php';
+        foreach ($contents as $class => $envs) {
+            if ($envs[$this->environment] ?? $envs['all'] ?? false) {
+                yield new $class();
+            }
+        }
+    }
+
+    public function getProjectDir(): string
+    {
+        return \dirname(__DIR__);
+    }
+
+    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader): void
+    {
+        $container->addResource(new FileResource($this->getProjectDir() . '/config/bundles.php'));
+        $container->setParameter('container.dumper.inline_class_loader', \PHP_VERSION_ID < 70400 || $this->debug);
+        $container->setParameter('container.dumper.inline_factories', true);
+        $confDir = $this->getProjectDir() . '/config';
+
+        $loader->load($confDir . '/{packages}/*' . self::CONFIG_EXTS, 'glob');
+        $loader->load($confDir . '/{packages}/' . $this->environment . '/*' . self::CONFIG_EXTS, 'glob');
+        $loader->load($confDir . '/{services}' . self::CONFIG_EXTS, 'glob');
+        $loader->load($confDir . '/{services}_' . $this->environment . self::CONFIG_EXTS, 'glob');
+
+        // register wallabag extension to custom load `wallabag.yaml`
+        $container->registerExtension(new WallabagExtension());
+
+        $loader = new YamlFileLoader($container, new FileLocator($this->getProjectDir() . '/config'));
+        $loader->load('wallabag.yaml');
+    }
+
+    protected function configureRoutes(RouteCollectionBuilder $routes): void
+    {
+        $confDir = $this->getProjectDir() . '/config';
+
+        $routes->import($confDir . '/{routes}/' . $this->environment . '/*' . self::CONFIG_EXTS, '/', 'glob');
+        $routes->import($confDir . '/{routes}/*' . self::CONFIG_EXTS, '/', 'glob');
+        $routes->import($confDir . '/{routes}' . self::CONFIG_EXTS, '/', 'glob');
+    }
+
+    protected function build(ContainerBuilder $container): void
+    {
+        $container->addCompilerPass(new ImportCompilerPass());
+    }
+}